THE NEW ONE IN THE RANGE OF THE TIRES WINTER: W.drive
As of the autumn, the conditions of circulation are degraded, and the motorists must face various conditions of road: dryness, rain, snow or glaze. To face these varied conditions, YOKOHAMA proposes an extraordinary range of tires winter. With its 3 profiles, the range winter of continuous YOKOHAMA to develop and presents a new tire top-of-the-range winter: W.drive.
The design of the asymmetrical tread to high-rigidity gets high performances balanced on dryness, the rain or the roads snow-covered. The 3 right grooves (or 4 according to dimensions') support the drainage of water or snow, even molten, and push back the limits of aquaplaning. The paving stones have different rigidities according to their provision on the tread. More rigid on the outside of the profile, they support adherence in the turns on dryness, whereas on the interior, their flexibility take part in adherence on snow.
Innovating plates “3D“
One of the major innovations of W.driveTM resides in the plates “3D “with a surface in polyhedron allowing of great performances on dryness, under the rain or on the snow-covered roads. The single design of the plates makes it possible the blocks of gum to be based the ones on the others, thus preserving the rigidity of the paving stones on a broader surface of contact. In parallel, this technology makes it possible to increase the density of the plates on the surface of the tread, thus multiplying the effect of blade on the snow-covered or icy roads.
Technology of the mixture of gum
The mixture of gum with its “flexible polymers “makes it possible to maintain the flexibility and flexibility thus adherence at low temperature. By integrating “micro silica “in the mixture, one improves rigidity at higher temperature. This very specific association is effective only if integration is homogeneous.
Thanks to extraordinary technology ZERUMATM, exclusive patent of YOKOHAMA, whose secrecy lies in the optimal dispersion of silica in the mixture of gum, the integration of the “micro silica “is optimal, which makes it possible to improve the behavior, motricity and braking some are the conditions of rolling and temperature.
A broad range
With a broad range of 70 references of the 14 “to 19 “and series 65 to 40, W.drive makes it possible to equip the unit with the automobile park. The indices speed go T (190 km/h) with V (240 km/h) and from many dimensions profit from reinforced indices of load and/or edge of protection of rim. With W.driveTM, to face the winter season and its traps is not any more one concern. Some are the conditions of road, each driver can consider each way in a serene way.
EU Tyre Label and Efficiency Classes
The European Union has introduced the EU Tyre Label by Regulation (No. 1222/2009) identically and bindingly for all EU member states. It applies to passenger car tyres, light commercial vehicle tyres and heavy commercial vehicle tyres produced after 01.07.2012.
Three different areas are tested: rolling resistance, wet grip and the rolling noise the tyre makes on the road.
The following are not affected by the EU Tyre Label: retreaded tyres, professional off-road tyres, racing tyres, tyres with additional devices to improve traction such as spiked tyres, T-type emergency tyres, special tyres for fitting to vehicles first registered before 1 October 1990, tyres with a maximum authorised speed of 80 km/h, tyres for rims with a nominal diameter of 254 mm or less or 635 mm or more.
With this regulation, the European Union is pursuing the goal of promoting economic and ecological efficiency in road traffic as well as increasing road safety on the one hand, and on the other hand, granting consumers more product transparency and at the same time serving as an active decision-making aid.
Already during the incorporation, experts criticise the fact that the EU Tyre Label unfortunately only shows a few product characteristics. Apart from rolling resistance, wet grip and rolling noise, which are the main focus of EU tyre labelling, tyres have much more important and safety-relevant product characteristics, such as aquaplaning properties, driving stability, service life, braking properties on dry and wet roads, behaviour in wintry conditions, etc.
Tyre manufacturers point out that test results from various institutions and journals remain an important information medium for the end consumer. These tests usually focus on further safety-relevant product characteristics besides the EU standard qualifications for tyre labelling, which are always important for the final customer.
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